DL-Lysine·HCl is widely used in the food and beverage industry as a nutritional supplement to enhance the protein content in various products. It is particularly beneficial in fortifying cereals, snacks, and dietary supplements, ensuring adequate lysine intake, which is essential for human health.

In the pharmaceutical sector, it serves as a key ingredient in formulations aimed at treating and preventing lysine deficiency. It is also utilized in the production of amino acid infusions and oral rehydration solutions, supporting recovery in patients with malnutrition or those recovering from surgery.

Additionally, DL-Lysine·HCl finds application in animal feed to promote growth and improve feed efficiency. It is especially valuable in poultry and swine diets, where lysine is a limiting amino acid, ensuring optimal growth and development.

In cosmetics, it is incorporated into skincare products for its moisturizing and anti-aging properties, helping to maintain skin elasticity and hydration.